I'll make this short. Here are my recommendations:
- Make an effort, every single comment you post, to knock it one step up the debate pyramid. (I'm equally guilty of this, but I'm going to
make an effort to improve.)
- Stop making, for want of a better word, circle-jerk posts. That's just going to drive people away until the entire site is like one low-quality subreddit.
- Vote properly.
- Only vote high-quality content insightful.
- If something's funny, vote it fun. If it's a "memey" post, only vote it insightful if it's actually insightful.
See the comments for the many, many arguments against my recommendations.